Quick start guide

91
Safety
In the example to the left,
if a hearing aid meets the
M2 level rating and the
wireless phone meets the
M3 level rating, the sum of the two
values equal M5. This should provide the
hearing aid user with “normal usage”
while using their hearing aid with the
particular wireless phone. “Normal
usage” in this context is defined as a
signal quality that’s acceptable for
normal operation.
The M mark is intended to be
synonymous with the U mark. The T
mark is intended to be synonymous
with the UT mark. The M and T marks
are recommended by the Alliance
for Telecommunications Industries
Solutions (ATIS). The U and UT marks are
referenced in Section 20.19 of the FCC
Rules. The HAC rating and measurement
procedure are described in the American
National Standards Institute (ANSI)
C63.19 standard.
When you're talking on a cell phone,
it's recommended that you turn the BT
(Bluetooth) or WLAN mode off for HAC.
For information about hearing aids and
digital wireless phones
Wireless Phones and Hearing Aid
Accessibility
http://www.accesswireless.org/Home.
aspx
FCC Hearing Aid Compatibility and
Volume Control
http://www.fcc.gov/cgb/consumerfacts/
hac_wireless.html